Question

The sum of the heights of a giraffe and a baby giraffe is 15m. If the baby giraffe has a height which is 2/3 that of the giraffe, what is the height of the baby giraffe?

Answer 1

mama giraffe: x

baby giraffe:
`(2)/(3) x`

`x + (2)/(3)x` = 15

`(3)x + (3)(2)/(3)x` = (3)15

3x + 2x = 45

5x = 45

x = 9

baby giraffe:
`(2)/(3) x` =
`(2)/(3)(9)` = 2(3) = 6

Answer: 6 m